1131222423 has 8 divisors (see below), whose sum is σ = 1549061488. Its totient is φ = 733765824.

The previous prime is 1131222419. The next prime is 1131222427. The reversal of 1131222423 is 3242221311.

It is an interprime number because it is at equal distance from previous prime (1131222419) and next prime (1131222427).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131222423 - 2² = 1131222419 is a prime.

It is a super-3 number, since 3×1131222423³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131222423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131222427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5095486 + ... + 5095707.

It is an arithmetic number, because the mean of its divisors is an integer number (193632686).

Almost surely, 2^1131222423 is an apocalyptic number.

1131222423 is a deficient number, since it is larger than the sum of its proper divisors (417839065).

1131222423 is a wasteful number, since it uses less digits than its factorization.

1131222423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10191233.

The product of its digits is 576, while the sum is 21.

The square root of 1131222423 is about 33633.6501587324. The cubic root of 1131222423 is about 1041.9558924771.

Adding to 1131222423 its reverse (3242221311), we get a palindrome (4373443734).

The spelling of 1131222423 in words is "one billion, one hundred thirty-one million, two hundred twenty-two thousand, four hundred twenty-three".